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Related Concept Videos

Structural Joints: Fibrous Joints01:03

Structural Joints: Fibrous Joints

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Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
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Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary...
4.3K
Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
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Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

2.4K
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
2.4K
Structural Classification of Joints01:20

Structural Classification of Joints

7.5K
Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
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Joints01:26

Joints

35.9K
Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...
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Related Experiment Video

Updated: Feb 15, 2026

Author Spotlight: Enhancing Post-Stroke Upper Limb Rehabilitation with Robotic Technologies for Improved Motor Recovery and Functional Outcomes
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Dynamic structure of lower limb joint angles during walking post-stroke.

Kelley Kempski1, Louis N Awad2, Thomas S Buchanan3

  • 1Department of Biomedical Engineering, University of Delaware, Newark, DE, United States.

Journal of Biomechanics
|January 13, 2018
PubMed
Summary

Individuals post-stroke show greater joint kinematic variability in their paretic limb compared to the non-paretic limb. This difference highlights the need for targeted interventions to improve gait post-stroke.

Keywords:
GaitNonlinear analysisStrokeVariability

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Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Area of Science:

  • Neuroscience
  • Biomechanics
  • Rehabilitation Science

Background:

  • Stroke-induced neuromotor changes lead to abnormal movement patterns, affecting gait.
  • The relationship between joint kinematic variability and post-stroke walking impairments is not fully understood.

Purpose of the Study:

  • To assess movement variability at the individual joint level in both paretic and non-paretic limbs of individuals post-stroke.

Main Methods:

  • Seven individuals with hemiparesis post-stroke walked on a treadmill.
  • Motion capture recorded kinematics; joint angle variability was quantified using the Lyapunov exponent (LyE).

Main Results:

  • The paretic limb exhibited higher LyE than the non-paretic limb for hip and knee flexion/extension angles.
  • These differences were observed at both self-selected and average 6-minute walk test speeds.

Conclusions:

  • Joint kinematic variability differs between limbs post-stroke, warranting further investigation into non-paretic limb deviations.
  • Bilaterally-targeted gait interventions may improve outcomes for individuals post-stroke.